/**
 * Copyright (c) 2012-2016, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.database.table.impl;

import org.tinygroup.database.table.TableSqlProcessor;

import java.util.List;


public class DerbySqlProcessorImpl extends SqlProcessorImpl {

    private static TableSqlProcessor tableSqlProcessor = new DerbySqlProcessorImpl();

    public static TableSqlProcessor getTableSqlProcessor() {
        tableSqlProcessor.setTableProcessor(TableProcessorImpl.getTableProcessor());
        return tableSqlProcessor;
    }

    protected String getDatabaseType() {
        return "derby";
    }

    protected String appendIncrease() {
        return " GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1)";
    }

    protected String createAlterTypeSql(String tableName, String fieldName,
                                        String tableDataType) {
        return String.format("ALTER TABLE %s ALTER %s SET DATA TYPE %s", tableName, delimiter(fieldName), tableDataType);
    }

    protected void appendComment(String comment, StringBuffer ddlBuffer, List<String> list) {
        //do nothing
    }
}
